package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;

    //修改
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        //属性拷贝
        BeanUtils.copyProperties(categoryDTO,category);
        category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }

    //分页查询
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> pageInfo = categoryMapper.pageQuery(categoryPageQueryDTO);
        return new PageResult(pageInfo.getTotal(),pageInfo.getResult());
    }

    //启用禁用
    @Override
    public void startOrStop(Integer status, Long id) {
        //创造一个对象
        Category category = Category.builder()
                .status(status)
                .id(id)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        categoryMapper.update(category);
    }

    //新增分类
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        //属性拷贝
        BeanUtils.copyProperties(categoryDTO,category);
        category.setCreateTime(LocalDateTime.now());
        category.setUpdateTime(LocalDateTime.now());
        category.setCreateUser(BaseContext.getCurrentId());
        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.save(category);
    }

    //删除
    @Override
    public void delete(Long id) {
        int count = dishMapper.countByType(id);
        if(count>0){
            throw new RuntimeException("当前分类下关联了菜品，不能删除");
        }
        else {
            categoryMapper.deleteById(id);
        }
    }

    @Override
    public List<Category> list(Integer type) {
        return categoryMapper.list(type);
    }

}
